3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * parts Copyright 1985, 1990, 1993 Free Software Foundation, Inc.
8 * \author Ivan Schreter
9 * \author Dirk Niggemann
10 * \author Asger Alstrup
11 * \author Lars Gullik Bjønnes
12 * \author Jean-Marc Lasgouttes
13 * \author Angus Leeming
17 * Full author contact details are available in file CREDITS.
19 * General path-mangling functions
24 #include "support/filetools.h"
26 #include "support/convert.h"
27 #include "support/debug.h"
28 #include "support/environment.h"
29 #include "support/gettext.h"
30 #include "support/lstrings.h"
31 #include "support/os.h"
32 #include "support/Package.h"
33 #include "support/Path.h"
34 #include "support/Systemcall.h"
35 #include "support/qstring_helpers.h"
39 #include <boost/assert.hpp>
40 #include <boost/regex.hpp>
57 bool isLyXFilename(string const & filename)
59 return suffixIs(ascii_lowercase(filename), ".lyx");
63 bool isSGMLFilename(string const & filename)
65 return suffixIs(ascii_lowercase(filename), ".sgml");
69 bool isValidLaTeXFilename(string const & filename)
71 string const invalid_chars("#$%{}()[]\"^");
72 return filename.find_first_of(invalid_chars) == string::npos;
76 string const latex_path(string const & original_path,
77 latex_path_extension extension,
80 // On cygwin, we may need windows or posix style paths.
81 string path = os::latex_path(original_path);
82 path = subst(path, "~", "\\string~");
83 if (path.find(' ') != string::npos) {
84 // We can't use '"' because " is sometimes active (e.g. if
85 // babel is loaded with the "german" option)
86 if (extension == EXCLUDE_EXTENSION) {
87 // ChangeExtension calls os::internal_path internally
88 // so don't use it to remove the extension.
89 string const ext = getExtension(path);
90 string const base = ext.empty() ?
92 path.substr(0, path.length() - ext.length() - 1);
93 // ChangeExtension calls os::internal_path internally
94 // so don't use it to re-add the extension.
95 path = "\\string\"" + base + "\\string\"." + ext;
97 path = "\\string\"" + path + "\\string\"";
101 return dots == ESCAPE_DOTS ? subst(path, ".", "\\lyxdot ") : path;
105 // Substitutes spaces with underscores in filename (and path)
106 FileName const makeLatexName(FileName const & file)
108 string name = file.onlyFileName();
109 string const path = file.onlyPath().absFilename() + "/";
111 // ok so we scan through the string twice, but who cares.
112 // FIXME: in Unicode time this will break for sure! There is
113 // a non-latin world out there...
114 string const keep = "abcdefghijklmnopqrstuvwxyz"
115 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
116 "@!'()*+,-./0123456789:;<=>?[]`|";
118 string::size_type pos = 0;
119 while ((pos = name.find_first_not_of(keep, pos)) != string::npos)
122 FileName latex_name(path + name);
123 latex_name.changeExtension(".tex");
128 string const quoteName(string const & name, quote_style style)
132 // This does not work for filenames containing " (windows)
133 // or ' (all other OSes). This can't be changed easily, since
134 // we would need to adapt the command line parser in
135 // Forkedcall::generateChild. Therefore we don't pass user
136 // filenames to child processes if possible. We store them in
137 // a python script instead, where we don't have these
139 return (os::shell() == os::UNIX) ?
143 return "\"" + subst(subst(name, "\\", "\\\\"), "\"", "\\\"")
146 // shut up stupid compiler
152 // Uses a string of paths separated by ";"s to find a file to open.
153 // Can't cope with pathnames with a ';' in them. Returns full path to file.
154 // If path entry begins with $$LyX/, use system_lyxdir
155 // If path entry begins with $$User/, use user_lyxdir
156 // Example: "$$User/doc;$$LyX/doc"
157 FileName const fileOpenSearch(string const & path, string const & name,
162 bool notfound = true;
163 string tmppath = split(path, path_element, ';');
165 while (notfound && !path_element.empty()) {
166 path_element = os::internal_path(path_element);
167 if (!suffixIs(path_element, '/'))
169 path_element = subst(path_element, "$$LyX",
170 package().system_support().absFilename());
171 path_element = subst(path_element, "$$User",
172 package().user_support().absFilename());
174 real_file = fileSearch(path_element, name, ext);
176 if (real_file.empty()) {
178 tmppath = split(tmppath, path_element, ';');
179 } while (!tmppath.empty() && path_element.empty());
189 // Returns the real name of file name in directory path, with optional
191 FileName const fileSearch(string const & path, string const & name,
192 string const & ext, search_mode mode)
194 // if `name' is an absolute path, we ignore the setting of `path'
195 // Expand Environmentvariables in 'name'
196 string const tmpname = replaceEnvironmentPath(name);
197 FileName fullname(makeAbsPath(tmpname, path));
198 // search first without extension, then with it.
199 if (fullname.isReadableFile())
203 return mode == may_not_exist ? fullname : FileName();
204 // Only add the extension if it is not already the extension of
206 if (getExtension(fullname.absFilename()) != ext)
207 fullname = FileName(addExtension(fullname.absFilename(), ext));
208 if (fullname.isReadableFile() || mode == may_not_exist)
214 // Search the file name.ext in the subdirectory dir of
216 // 2) build_lyxdir (if not empty)
218 FileName const libFileSearch(string const & dir, string const & name,
221 FileName fullname = fileSearch(addPath(package().user_support().absFilename(), dir),
223 if (!fullname.empty())
226 if (!package().build_support().empty())
227 fullname = fileSearch(addPath(package().build_support().absFilename(), dir),
229 if (!fullname.empty())
232 return fileSearch(addPath(package().system_support().absFilename(), dir), name, ext);
236 FileName const i18nLibFileSearch(string const & dir, string const & name,
239 /* The highest priority value is the `LANGUAGE' environment
240 variable. But we don't use the value if the currently
241 selected locale is the C locale. This is a GNU extension.
243 Otherwise, w use a trick to guess what support/gettext.has done:
244 each po file is able to tell us its name. (JMarc)
247 string lang = to_ascii(_("[[Replace with the code of your language]]"));
248 string const language = getEnv("LANGUAGE");
249 if (!lang.empty() && !language.empty())
253 lang = split(lang, l, ':');
256 // First try with the full name
257 tmp = libFileSearch(addPath(dir, l), name, ext);
261 // Then the name without country code
262 string const shortl = token(l, '_', 0);
264 tmp = libFileSearch(addPath(dir, shortl), name, ext);
270 // For compatibility, to be removed later (JMarc)
271 tmp = libFileSearch(dir, token(l, '_', 0) + '_' + name,
274 lyxerr << "i18nLibFileSearch: File `" << tmp
275 << "' has been found by the old method" <<endl;
279 lang = split(lang, l, ':');
282 return libFileSearch(dir, name, ext);
286 string const libScriptSearch(string const & command_in, quote_style style)
288 static string const token_scriptpath = "$$s/";
290 string command = command_in;
291 // Find the starting position of "$$s/"
292 string::size_type const pos1 = command.find(token_scriptpath);
293 if (pos1 == string::npos)
295 // Find the end of the "$$s/some_subdir/some_script" word within
296 // command. Assumes that the script name does not contain spaces.
297 string::size_type const start_script = pos1 + 4;
298 string::size_type const pos2 = command.find(' ', start_script);
299 string::size_type const size_script = pos2 == string::npos?
300 (command.size() - start_script) : pos2 - start_script;
302 // Does this script file exist?
303 string const script =
304 libFileSearch(".", command.substr(start_script, size_script)).absFilename();
306 if (script.empty()) {
307 // Replace "$$s/" with ""
308 command.erase(pos1, 4);
310 // Replace "$$s/foo/some_script" with "<path to>/some_script".
311 string::size_type const size_replace = size_script + 4;
312 command.replace(pos1, size_replace, quoteName(script, style));
319 static FileName createTmpDir(FileName const & tempdir, string const & mask)
321 LYXERR(Debug::FILES, "createTmpDir: tempdir=`" << tempdir << "'\n"
322 << "createTmpDir: mask=`" << mask << '\'');
324 FileName const tmpfl = FileName::tempName(tempdir.absFilename()
326 // FileName::tempName actually creates a file to make sure that it
327 // stays unique. So we have to delete it before we can create
328 // a dir with the same name. Note also that we are not thread
329 // safe because of the gap between unlink and mkdir. (Lgb)
332 if (tmpfl.empty() || !tmpfl.createDirectory(0700)) {
333 lyxerr << "LyX could not create the temporary directory '"
334 << tmpfl << "'" << endl;
342 FileName const createLyXTmpDir(FileName const & deflt)
344 if (deflt.empty() || deflt.absFilename() == "/tmp")
345 return createTmpDir(FileName("/tmp"), "lyx_tmpdir");
347 if (deflt.createDirectory(0777))
350 if (deflt.isDirWritable()) {
351 // deflt could not be created because it
352 // did exist already, so let's create our own
354 return createTmpDir(deflt, "lyx_tmpdir");
356 // some other error occured.
357 return createTmpDir(FileName("/tmp"), "lyx_tmpdir");
362 // Strip filename from path name
363 string const onlyPath(string const & filename)
365 // If empty filename, return empty
366 if (filename.empty())
369 // Find last / or start of filename
370 size_t j = filename.rfind('/');
371 return j == string::npos ? "./" : filename.substr(0, j + 1);
375 // Convert relative path into absolute path based on a basepath.
376 // If relpath is absolute, just use that.
377 // If basepath is empty, use CWD as base.
378 // Note that basePath can be a relative path, in the sense that it may
379 // not begin with "/" (e.g.), but it should NOT contain such constructs
381 // FIXME It might be nice if the code didn't simply assume that.
382 FileName const makeAbsPath(string const & relPath, string const & basePath)
384 FileName relative_path(relPath);
385 // checks for already absolute path
386 if (relative_path.isAbsolute())
387 return relative_path;
389 // Copies given paths
390 string tempRel = os::internal_path(relPath);
391 // Since TempRel is NOT absolute, we can safely replace "//" with "/"
392 tempRel = subst(tempRel, "//", "/");
396 FileName base_path(basePath);
397 if (base_path.isAbsolute())
400 tempBase = addPath(FileName::getcwd().absFilename(), basePath);
402 // Handle /./ at the end of the path
403 while (suffixIs(tempBase, "/./"))
404 tempBase.erase(tempBase.length() - 2);
406 // processes relative path
407 string rTemp = tempRel;
410 while (!rTemp.empty()) {
412 rTemp = split(rTemp, temp, '/');
414 if (temp == ".") continue;
416 // Remove one level of TempBase
417 string::difference_type i = tempBase.length() - 2;
420 while (i > 0 && tempBase[i] != '/')
423 tempBase.erase(i, string::npos);
426 } else if (temp.empty() && !rTemp.empty()) {
427 tempBase = os::current_root() + rTemp;
430 // Add this piece to TempBase
431 if (!suffixIs(tempBase, '/'))
437 // returns absolute path
438 return FileName(tempBase);
442 // Correctly append filename to the pathname.
443 // If pathname is '.', then don't use pathname.
444 // Chops any path of filename.
445 string const addName(string const & path, string const & fname)
447 string const basename = onlyFilename(fname);
450 if (path != "." && path != "./" && !path.empty()) {
451 buf = os::internal_path(path);
452 if (!suffixIs(path, '/'))
456 return buf + basename;
460 // Strips path from filename
461 string const onlyFilename(string const & fname)
466 string::size_type j = fname.rfind('/');
467 if (j == string::npos) // no '/' in fname
471 return fname.substr(j + 1);
475 // Create absolute path. If impossible, don't do anything
476 // Supports ./ and ~/. Later we can add support for ~logname/. (Asger)
477 string const expandPath(string const & path)
479 // checks for already absolute path
480 string rTemp = replaceEnvironmentPath(path);
481 FileName abs_path(rTemp);
482 if (abs_path.isAbsolute())
486 string const copy = rTemp;
489 rTemp = split(rTemp, temp, '/');
492 return FileName::getcwd().absFilename() + '/' + rTemp;
495 return package().home_dir().absFilename() + '/' + rTemp;
498 return makeAbsPath(copy).absFilename();
500 // Don't know how to handle this
505 // Search the string for ${VAR} and $VAR and replace VAR using getenv.
506 string const replaceEnvironmentPath(string const & path)
508 // ${VAR} is defined as
509 // $\{[A-Za-z_][A-Za-z_0-9]*\}
510 static string const envvar_br = "[$]\\{([A-Za-z_][A-Za-z_0-9]*)\\}";
512 // $VAR is defined as:
513 // $\{[A-Za-z_][A-Za-z_0-9]*\}
514 static string const envvar = "[$]([A-Za-z_][A-Za-z_0-9]*)";
516 static boost::regex envvar_br_re("(.*)" + envvar_br + "(.*)");
517 static boost::regex envvar_re("(.*)" + envvar + "(.*)");
520 string result = path;
522 regex_match(result, what, envvar_br_re);
523 if (!what[0].matched) {
524 regex_match(result, what, envvar_re);
525 if (!what[0].matched)
528 result = what.str(1) + getEnv(what.str(2)) + what.str(3);
534 // Make relative path out of two absolute paths
535 docstring const makeRelPath(docstring const & abspath, docstring const & basepath)
536 // Makes relative path out of absolute path. If it is deeper than basepath,
537 // it's easy. If basepath and abspath share something (they are all deeper
538 // than some directory), it'll be rendered using ..'s. If they are completely
539 // different, then the absolute path will be used as relative path.
541 docstring::size_type const abslen = abspath.length();
542 docstring::size_type const baselen = basepath.length();
544 docstring::size_type i = os::common_path(abspath, basepath);
547 // actually no match - cannot make it relative
551 // Count how many dirs there are in basepath above match
552 // and append as many '..''s into relpath
554 docstring::size_type j = i;
555 while (j < baselen) {
556 if (basepath[j] == '/') {
557 if (j + 1 == baselen)
564 // Append relative stuff from common directory to abspath
565 if (abspath[i] == '/')
567 for (; i < abslen; ++i)
570 if (suffixIs(buf, '/'))
571 buf.erase(buf.length() - 1);
572 // Substitute empty with .
579 // Append sub-directory(ies) to a path in an intelligent way
580 string const addPath(string const & path, string const & path_2)
583 string const path2 = os::internal_path(path_2);
585 if (!path.empty() && path != "." && path != "./") {
586 buf = os::internal_path(path);
587 if (path[path.length() - 1] != '/')
591 if (!path2.empty()) {
592 string::size_type const p2start = path2.find_first_not_of('/');
593 string::size_type const p2end = path2.find_last_not_of('/');
594 string const tmp = path2.substr(p2start, p2end - p2start + 1);
601 string const changeExtension(string const & oldname, string const & extension)
603 string::size_type const last_slash = oldname.rfind('/');
604 string::size_type last_dot = oldname.rfind('.');
605 if (last_dot < last_slash && last_slash != string::npos)
606 last_dot = string::npos;
609 // Make sure the extension starts with a dot
610 if (!extension.empty() && extension[0] != '.')
611 ext= '.' + extension;
615 return os::internal_path(oldname.substr(0, last_dot) + ext);
619 string const removeExtension(string const & name)
621 return changeExtension(name, string());
625 string const addExtension(string const & name, string const & extension)
627 if (!extension.empty() && extension[0] != '.')
628 return name + '.' + extension;
629 return name + extension;
633 /// Return the extension of the file (not including the .)
634 string const getExtension(string const & name)
636 string::size_type const last_slash = name.rfind('/');
637 string::size_type const last_dot = name.rfind('.');
638 if (last_dot != string::npos &&
639 (last_slash == string::npos || last_dot > last_slash))
640 return name.substr(last_dot + 1,
641 name.length() - (last_dot + 1));
647 string const unzippedFileName(string const & zipped_file)
649 string const ext = getExtension(zipped_file);
650 if (ext == "gz" || ext == "z" || ext == "Z")
651 return changeExtension(zipped_file, string());
652 return "unzipped_" + zipped_file;
656 FileName const unzipFile(FileName const & zipped_file, string const & unzipped_file)
658 FileName const tempfile = FileName(unzipped_file.empty() ?
659 unzippedFileName(zipped_file.toFilesystemEncoding()) :
662 string const command = "gunzip -c " +
663 zipped_file.toFilesystemEncoding() + " > " +
664 tempfile.toFilesystemEncoding();
666 one.startscript(Systemcall::Wait, command);
667 // test that command was executed successfully (anon)
668 // yes, please do. (Lgb)
673 docstring const makeDisplayPath(string const & path, unsigned int threshold)
677 // If file is from LyXDir, display it as if it were relative.
678 string const system = package().system_support().absFilename();
679 if (prefixIs(str, system) && str != system)
680 return from_utf8("[" + str.erase(0, system.length()) + "]");
682 // replace /home/blah with ~/
683 string const home = package().home_dir().absFilename();
684 if (!home.empty() && prefixIs(str, home))
685 str = subst(str, home, "~");
687 if (str.length() <= threshold)
688 return from_utf8(os::external_path(str));
690 string const prefix = ".../";
693 while (str.length() > threshold)
694 str = split(str, temp, '/');
696 // Did we shorten everything away?
698 // Yes, filename itself is too long.
699 // Pick the start and the end of the filename.
700 str = onlyFilename(path);
701 string const head = str.substr(0, threshold / 2 - 3);
703 string::size_type len = str.length();
705 str.substr(len - threshold / 2 - 2, len - 1);
706 str = head + "..." + tail;
709 return from_utf8(os::external_path(prefix + str));
713 bool readLink(FileName const & file, FileName & link)
716 char linkbuffer[512];
717 // Should be PATH_MAX but that needs autconf support
718 string const encoded = file.toFilesystemEncoding();
719 int const nRead = ::readlink(encoded.c_str(),
720 linkbuffer, sizeof(linkbuffer) - 1);
723 linkbuffer[nRead] = '\0'; // terminator
724 link = makeAbsPath(linkbuffer, onlyPath(file.absFilename()));
732 cmd_ret const runCommand(string const & cmd)
734 // FIXME: replace all calls to RunCommand with ForkedCall
735 // (if the output is not needed) or the code in ISpell.cpp
736 // (if the output is needed).
738 // One question is if we should use popen or
739 // create our own popen based on fork, exec, pipe
740 // of course the best would be to have a
741 // pstream (process stream), with the
742 // variants ipstream, opstream
744 #if defined (HAVE_POPEN)
745 FILE * inf = ::popen(cmd.c_str(), os::popen_read_mode());
746 #elif defined (HAVE__POPEN)
747 FILE * inf = ::_popen(cmd.c_str(), os::popen_read_mode());
749 #error No popen() function.
752 // (Claus Hentschel) Check if popen was succesful ;-)
754 lyxerr << "RunCommand:: could not start child process" << endl;
755 return make_pair(-1, string());
761 ret += static_cast<char>(c);
765 #if defined (HAVE_PCLOSE)
766 int const pret = pclose(inf);
767 #elif defined (HAVE__PCLOSE)
768 int const pret = _pclose(inf);
770 #error No pclose() function.
774 perror("RunCommand:: could not terminate child process");
776 return make_pair(pret, ret);
780 FileName const findtexfile(string const & fil, string const & /*format*/)
782 /* There is no problem to extend this function too use other
783 methods to look for files. It could be setup to look
784 in environment paths and also if wanted as a last resort
785 to a recursive find. One of the easier extensions would
786 perhaps be to use the LyX file lookup methods. But! I am
787 going to implement this until I see some demand for it.
791 // If the file can be found directly, we just return a
792 // absolute path version of it.
793 FileName const absfile(makeAbsPath(fil));
794 if (absfile.exists())
797 // No we try to find it using kpsewhich.
798 // It seems from the kpsewhich manual page that it is safe to use
799 // kpsewhich without --format: "When the --format option is not
800 // given, the search path used when looking for a file is inferred
801 // from the name given, by looking for a known extension. If no
802 // known extension is found, the search path for TeX source files
804 // However, we want to take advantage of the format sine almost all
805 // the different formats has environment variables that can be used
806 // to controll which paths to search. f.ex. bib looks in
807 // BIBINPUTS and TEXBIB. Small list follows:
808 // bib - BIBINPUTS, TEXBIB
810 // graphic/figure - TEXPICTS, TEXINPUTS
811 // ist - TEXINDEXSTYLE, INDEXSTYLE
812 // pk - PROGRAMFONTS, PKFONTS, TEXPKS, GLYPHFONTS, TEXFONTS
814 // tfm - TFMFONTS, TEXFONTS
815 // This means that to use kpsewhich in the best possible way we
816 // should help it by setting additional path in the approp. envir.var.
817 string const kpsecmd = "kpsewhich " + fil;
819 cmd_ret const c = runCommand(kpsecmd);
821 LYXERR(Debug::LATEX, "kpse status = " << c.first << '\n'
822 << "kpse result = `" << rtrim(c.second, "\n\r") << '\'');
824 return FileName(rtrim(to_utf8(from_filesystem8bit(c.second)), "\n\r"));
830 void removeAutosaveFile(string const & filename)
832 string a = onlyPath(filename);
834 a += onlyFilename(filename);
836 FileName const autosave(a);
837 if (autosave.exists())
838 autosave.removeFile();
842 void readBB_lyxerrMessage(FileName const & file, bool & zipped,
843 string const & message)
845 LYXERR(Debug::GRAPHICS, "[readBB_from_PSFile] " << message);
846 // FIXME: Why is this func deleting a file? (Lgb)
852 string const readBB_from_PSFile(FileName const & file)
854 // in a (e)ps-file it's an entry like %%BoundingBox:23 45 321 345
855 // It seems that every command in the header has an own line,
856 // getline() should work for all files.
857 // On the other hand some plot programs write the bb at the
858 // end of the file. Than we have in the header:
859 // %%BoundingBox: (atend)
860 // In this case we must check the end.
861 bool zipped = file.isZippedFile();
862 FileName const file_ = zipped ? unzipFile(file) : file;
863 string const format = file_.guessFormatFromContents();
865 if (format != "eps" && format != "ps") {
866 readBB_lyxerrMessage(file_, zipped,"no(e)ps-format");
870 static boost::regex bbox_re(
871 "^%%BoundingBox:\\s*([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)\\s+([[:digit:]]+)");
872 ifstream is(file_.toFilesystemEncoding().c_str());
877 if (regex_match(s, what, bbox_re)) {
878 // Our callers expect the tokens in the string
879 // separated by single spaces.
880 // FIXME: change return type from string to something
883 os << what.str(1) << ' ' << what.str(2) << ' '
884 << what.str(3) << ' ' << what.str(4);
885 string const bb = os.str();
886 readBB_lyxerrMessage(file_, zipped, bb);
890 readBB_lyxerrMessage(file_, zipped, "no bb found");
895 int compare_timestamps(FileName const & file1, FileName const & file2)
897 // If the original is newer than the copy, then copy the original
898 // to the new directory.
901 if (file1.exists() && file2.exists()) {
902 double const tmp = difftime(file1.lastModified(), file2.lastModified());
904 cmp = tmp > 0 ? 1 : -1;
906 } else if (file1.exists()) {
908 } else if (file2.exists()) {
916 } //namespace support